| Formia to Santander | 900.52 mi (1,449.24 km) |
| Formia to Santany | 567.79 mi (913.77 km) |
| Formia to Santiago de Compostela | 1,138.72 mi (1,832.59 km) |
| Formia to Santiago del Teide | 1,931.57 mi (3,108.56 km) |
| Formia to Santiponce | 1,080.65 mi (1,739.13 km) |
| Formia to Santomera | 809.73 mi (1,303.14 km) |
| Formia to Santona | 883.03 mi (1,421.09 km) |
| Formia to Santurce-Antiguo | 861.16 mi (1,385.91 km) |
| Formia to Sarria | 1,081.81 mi (1,741.00 km) |
| Formia to Sauzal | 1,905.44 mi (3,066.51 km) |
| Formia to Sedavi | 747.32 mi (1,202.70 km) |
| Formia to Segorbe | 746.05 mi (1,200.66 km) |
| Formia to Segovia | 921.95 mi (1,483.73 km) |
| Formia to Senmanat | 594.71 mi (957.10 km) |
| Formia to Sesena | 909.22 mi (1,463.25 km) |
